Pasteurizer



l. R. HIPPENIVIEYER AND C. SKIDD.

PAsIEuIIIzEII. APPLICATION FILED 056.11.1918.'

Patented Apr. 11, 1922.

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l. R. HIPPENMEYER AND C. SKIDD.

PASTEURIZER.

APPLICATION FILED DEC. 1I, |918.

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Patented Apr. 11, 1922.

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l I. R. .HIPPENMEYER AND C. SKiDD. l

PASTEURIZER.

APPLICATION FILED DEcJi, 191s.

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ravine afnirramrnvnn Alvi) CHARLES-exijan, or JANiisvInLE, WISCONSIN,

Assrernons To CHARLES sxrnn MANUrAo'r'URrNG ooiirPAlvY, on JANas- To all whom t may concern: i v

Be it known that We, IRVING R. HIPPEN- MEYER and CHARLES SKIDD, citizens of the United States, residing at Janesville', in the county of Rock and State of Wisconsin, have invented certain newvand useful Improvements in Pasteurizers, of which the follow-V ing is a specification.

'Pasteurizatiom as practically carried on,

consists of heating the liquid Vto be pasteurized to a temperature that `Willdestroyy all,

or nearly all of the harmful bacteria and 'then cooling the liquid to a temperature s`uficiently low to preventv the spores from ger- Pasteurization may be contin minating. nous or intermittent In the 'former'the raw liquid ovvs into the v apparatus, is pasteurized, cooled and flows out of the apparatus in a continuous stream. In the intermittent or batch system, a certain amount of liquid is put into the machine, is

pasteurized and cooled and then'taken out.`

Again, pasteurization may be carried on by either the dash or the holding process. In the`flash system the liquid is heated to a temperature suiliciently high toinstantaneously kill the bacteria, and is then` immediately cooled, While in the Aholding process a lowerV temperature is maintained `for a period of 2O or 30 minutes, Vafter Which the milk is cooled. Either Ythe flash or the holding process may be applied to either the batch or continuous chine. d Y

The temperature for pasteurization varies greatly but in general lthe temperaturemust Ybe increased as the period .of exposure` decreases. Hence it isnecessary to raise the liquid to a much higher degree of temperature in the dash methodthanvin the holding method. For -e'xamplefor the pasteurization of milk by the flash method a tem y Y V12er, partly l1n, 'elevationand partly in section perature of 160 degrees F. to lvdegreesF.

` is required for goodl results While by the holding method, when held V:tor a Yperiod of from 2O "to- 30 minutes,"a temperaturelot 140 degrees `vl1" to 14:5'Jdegre'es Rrr-is'suflig cient.

perature. IBut'the "holding methodv hasl here# 4 .Other objects type .of 'ma-V y maintained. y. f

Our invention consists generallyV in a pasrAs'rnunrzEn.

Specification of Letters Patent. `Pa1j9n1jed Apr. l11, 1922. Application Vfiled December l1, 1918. Serial No., 2 66,248. f' 'i tofor'eqmet practical objectionslbecauseiiof the size and character of the machinenecessimilar liquids and relates more particularly ,to an apparatus for the pasteurization of such liquids under the batch orV holding method. y A l' The general object of our invention is to providey a more compact intermittent pasteurizer wherevvith it. shall be,4 possible to heat, hold for the desired cool the Ypasteurized liquid. Y n

A further object of your invention' isl to provide a single unitary structure of such .form `that itkshall serveithe combined funcand then cooling tions of heating, holding, theliquid;

ofour invention are toy provide a pasteurizer With a minimum number of movingparts; in which the pasteurizing surfaces shall be readily vaccessible and of period and thenV such' form that they may be easily and thor-V 'Y oughly cleaned; in vvhich the liquidtoA be pasteurized shall be retarded inits passage over the heating and cooling-'surface to the end that a maximum thermictransmission may be attained in Vva relatively small ma'-v chine; and in which therparts shall'be ofV such simple fand substantial ormthat they" mayf'be cheaplyv built and inexpensively teurizer-ofl suchy form and construction that theyV above named objects,. together with Y'others that will appear hereinafter, Yare attainable and our invention Will befrnore'V readily'understood by ,rei-ferencev to the? accompanying drawings wherein:

Figure lis' a'vverticalfvie'w of the pasteur- 1 and with some parts broken away for the sake of' clearness'. lFig. i2 is a Afragmentary l sectional `detail 'view taken on line 2-#2 of 4. Fig. y 3 fis va i'raginent'aryvertical sectional view showing'one Way of insulating the'rliquid holding chamber. A IFig; i-.is

aI side elevation of the pastuerizer. Fig. 5 1s alfragmentary detail View of oneofthe throughthe same takenY on line 646 of Fig.

5. Fig.4 7 a top plan 'view ofthe Vp as- `nected up with a tempering fluid which serves as a liquidholder, may be insulated as indicated in Fig. 3.

The lower end of the cylinder is secured to and closed by a head or base, 2, said base being supported by any suitable means, as, for example, a plurality of legs, 3. Attached to the upper end of the cylinder, 1, is an inwardly and upwardly extending flange, 4, defining an opening, 5. Said opening is norm'allyv closed by a cover, 6, consisting of two sections, 7, hinged to a central section 8.

An outlet pipe, 10, extends from the lower head or base, 2, toa valve, 11. Said valve comprises a valve member having; a port which is adapted to connect the pipe, 10, to an outletpipe, 14. The pipe, 14, may lead to apbottle filler or any other desired point.

'Surrounding the cylinder, 1, and attached thereto. is a helical conductor for the tempering fluids. vl/Vhile this conductor may be of any suitable construction, it is preferably constructed so as to have an approximately yhorizontal upper surface, 16, a curved Y in which at the same time because of the 'y `gentle undulatory shape does not pocket the under surface, 16', and gently curved con-V necting portions, 16C, and 16d. as is best shown' in Fig. 1. This construction provides l one yin which the milk flow is retarded thus yenabling a greater thermic transmission between the milk and t-he tempering iuid and milk in av manner to cause it to coagulate or burn and furnishes a surface that can be easily and thoroughly cleaned. It should be noted also that the wall oi' the holding chamber serves as one Wall for the temperating liquid conduit thus reducing the cost and simplifying the manufacture thereof (see Fig. 1).

In this conductor is inserted a casting providing necessary pipe connections as well as partition or plug 15 (Fig. 2) which practically divides the conductor into an upper conductor 16 and a lower conductor 17. The means for circulating tempering 'fluids through these conductors' will be hereinafter described. i

Surrounding theV lower portion' of the Acylinder is a milk-collecting trough 18. The

trough is connected by means of a pipe 19 to the valve 11. The valve member ot said valve is provided with a passage which is 'adapted to connect the pipe 19 with a pipe 21 that is connected to the intake of a milk Ypump l22. 23 is a line of pipe through which the pump 11 discharges milk to a valve 24. This pipe may be insulated, if de sired. The valve 24 may be identical in construction with the valve 11. 25 is a milk supply pipe connected to the valve 24. 26 is a pipe extending from the valve 24 through the'portion 8 Ot the'cover so as to discharge milk 'into the cylinder 1, 27 is a pipe extending from the valve 24 to an annular milk-distributing pipe 28 that overlies the cylinder 1 and, is so perforated as to discharge the milk upon the upper end of the conductor 16. in the pipes 23, 25 and 27 are unions 29, 30 and 31 to permit of disconnecting and removing the pipes 23 and 27 and the valve 24 when the agitator hereinafter described is to be removed from the chamber 1. The movable valve member of the valve 24 is provided with a handle 32 by means of which said valve member' may be set to connect the supplypipe 25 to the pipe 27. Said valve member at the same time connects the pipe 23 to the pipe 26.

The means for supplying hot water to 4the conductors 16 and 17 comprises a pump 33, the inlet of which is connected to a tank 34 (Fig. 10) by means of a pipe 35. The discharge side of the pump is connected by Ymeans of a pipe 36 to the lower portion ot the conductor 17 .Y The upper portion of the conductor 17 is connected by means of a .pipe 37 Yto a three-way valve 38, said valve being connected to the lower end of the conductor 16 by means of a pipe'39.

To the upper end of the conductor 16 is connected a pipe 40 which leads to a threeway valve 41. Said valve is connected by means of a pipe 42 to a suitable sprayer or jet-head 43 herein shown as consisting oa perforated circular pipe, said pipe being located within the upper portion of the tank 34. A steam pipe 44 supplies steam to heat the Water in the tank 34. The system my be drained of hot water in any suitable wa as by means of a drain cock 34a on the tank 34. Y 1

In cooling the milk, cold water from a suitable supply, such as the city main, is passed through the upper conductor 16, and

brine or ice water is circulated through the lower conductor 17. 45 is a cold water snpply pipe connected to any suitable source of supply of cold water. 46 is a shut-oit valve in said pipe. The pipe 45 is connected. to the pipe 39 so as to supply water to the lower end ofthe upper conductor 16. The valve n41 is connected to a-waste pipe 47.

W'hen' brine or ice water isbeing pumpedV Vfrom the tank 34 Athrough the pipes 35 and '36 intol the lower. end of thelow'er conductor 17, the-brine or ice water leaves the upper end of said conductor through the pipe 37 and ,passesV thence through the three-way valve 38, pipev48, the pipe 42,'andlthe spray pipe'43 to the vtank 34. A

a The milk pump 22 and thejpump 33 arer driven from a shaft 49 carrying Ya .tight pulley and a loose pulley 51. i Any suitable means may be provided ,to

agitate the contents of the cylinderv 1 In Fig. 1 is shown an agitator comprising twov arms52 carrying perforated blades53, said arms being detachably secured to the upper end of a shaft 54. Herein the arms 52 are 1 shown as having a'socket 55 which lits upon the upper end of the shaft 54.. 56 is a pin fixed in the socket and resting in a slot-g 57 in the upper end of the shaft. Said shaft is supported axially ofthe cylinder 1, be-

ing mounted in a bearing 58 on thebase 2.

the arms to support vertical shafts 63 which carry blades or `-agitatingV elements 64. Fixed to each of the shafts 63 is a friction wheel 65 that makes contact with a friction disk 66 which is stationarily securedlto thev upper end of the shaft-enclosing tube 67.

'it will be seen that when the shaft`62 is rotated, the agitating elements 64 Ywill ybe given an orbital movement Varound the shaft 62 andwill also be rotated upon their axes.

Preferably, the conductors 16 andv 17 are provided with an enclosing casing or mantle which may be of any suitable construction. Herein the mantle is shown as consisting of two hinged sections V68 and V69 arranged to be swung apart to provide access to the outside of the conductors 16y and 17, the trough V18 andl -thepipe 28. Said sections are hinged to a suitable upright support, as, for example, two bars 70 and-'71' ii'xed to a tubular post 72.' f

While the four-way valves 11 and-24 'may' be of any suitable type, -we have yherein Y' shown a construction comprising a casing f is filledr with hotv waterythe valve 38 issetv a (Fig 6) having four pipefc'onnections on its periphery. 'Said casing'has a4 tapered chamber to receive a vcorrespondingly tapered valve plug Z2V whichl is held in place by 1 a cap plate @anda screw'd. In the plug 1s a port .e to connect twopipes '(as,V .for example, 25 and 27), a port 7, to connect two Y other pipes (as 23 and 26), and arportg to connect two opposite pipes (as 23 and V27). v The operation is as follows: The tankf34 to connect the pipes 37 and 39; the valvel41 is set to'connect the-pipes 4,0 and 42' andthe to` connect the milk supply pipe 25 tothe Yshaft 49 is driven. The valve24 is operated Y I pipe 27, and to connect the., pipe 23 `to the i pipe 26.* The `valve 11 is set to connect the 2 pipe19 to the pipe 21,'and to close the pipes Y 10 and 14. Milk flows' fromv the pipe 25'to the pipe 27, being discharged bythe pipe 28 upon the outer surface of the upper turn'off.V

the conductor16. As the milk flows ldown the heated conductors, 16 and'l?, itis heated to the pasteurizing temperature. The milk iscollected in the trough 18 and flows thence 1 through the pipe 19 to the pipe 21, the pump j l 22. forcing the milk through the pipes 23 and 26 to the interior of the cylinder 1. VWhen thecylinder is full, the valve 24 is operated to shut off theV supply pipe 25 and to connect the pipes 23 and 27. The milk is allowed to` remain `in the cylinder 1 for 'a Vsufficient length -of time (say, twenty or thirty minutes) to'insure the bacteria.

destruct-ion of pathogenic y The hot water having been drainedfrom/ the tank 34 and the conductors 16 and 17, a quantityV of ice and water is placed in the tank; the valve 38 isset to connect the pipes Y 37 and 48; the valve 46 is opened tokadmit cold water; and the valve 41 isset toconnect. i'

the pipe 40 tothe waste pipe 47. p. Y Cold water is thereby forced through the upper conductor 16. The pump 33 is actuatedto circulate ice water or brine lthrough the tank 34, pipes 35 and 36, conductors 17 ,pipes 37 48 and 42 andthe sprayer 43`backl to the tank.

The valve 11 is then set to connect the pipe 10 tothe pipe 21, and to'placethe pipes 19' and 1 4 in communication withy each other.

The heated milk then flows Vthrough the;

pipes 10'and 21lto theA pump 22, the latter serving to force the milkthrough the 23 and 27 to the distributing pipe 28.` ln iiowing down over the cold conductors 16 `and 17,*the milkis cooled to the desired tem-'1 Y perat-ure. l It is collected-Yin the trough 18 l and flows through the pipes19-.and 14 to the bottle filler orother-desiredpoint.' Y' Experience has shown thatfthefapparatus herein disclosed is very'efficient in heatingg'.

holding and Ycooling milk, cream and the like. All parts'that come in contact V`with milk are readily accessible for cleaning.;

pipes It will beunderstood that the arrangie- Y ment illustrated in Fig.y 10`is merely dia-'J-- e grammatic, and that any suitable means for supplying l tempering fluids may. be' em# ployed. I 4 A n.

vIn the following claims we' have usedthe lar liquids. 1 Ve claim as our invention:- 1.114.* pasteurizing Y' apparatus having, in combination, a 'milk-holding chamber;Y a

lterm .milk'to denote milk, creaml and-simi` tempering fluid conductor; means for supplying hot and cold fluids to lsaid conductor; means 'for discharging milk upon the upper portion ot said conductor; a trough adjacent to the lower portion of the conductor; an outlet pipe; piping connecting the chamber, the discharging means, the trough and the outlet pipe; and valve means Controlling the iiow of milk through said piping.

2. A pasteurizing apparatus having, in combination, a milk holding chamber; a tempering-fluid conductor surrounding t-he chamber; means for supplying hot and cold fluids to said conductor; means for discharging milk upon the upper portion ot said conductor; a trough adjacent to the lower por tion of the conductor; an outlet pipe; piping connecting the chamber, the discharging means, the trough and the outlet pipe; and valve means controlling the flow ofmilk through said piping.

3. A pasteurizing apparatus having, combination; a milk-holding chamber; tempering-fluid conductor; a milk-collecting trough'near the lower portion of the chamber; means for discharging milk upon the upper portion of said conductor, and means for conducting milk from the trough to said chamber and for conducting milk Jfrom said chamber to said discharging means.

4. A pasteurizing apparatus having, in combination` a milk-holding chamber.; a tempering-huid conductor surrounding the chamber; a milk-collecting' troughsurrounding the lower portion of the chamber; means for discharging milk upon the upper portion ot said conductor, and Vmeans for conducting milk rom the trough to said chamber and for conducting milk from said chamber to said discharging means.

5. A pasteurizing apparatus having, in

combination, a milk-holding chamber; an

upper and a lower tempering-fluid conductor; means for establishing and breaking communication between the adjacent ends of said'conductors; means forsupplying tempering iiuids to the conductors; means Jfor discharging milk upon the upper conductor, and means for conducting the milk from a point adjacent to the lower conductor to said chamber.

6. A pasteurizing apparatus having, in combination.r a milk-holding chamber; an upperand a lower tempering-'fluid conductor surrounding the chamber; means for supplyingtempering iiuids to the conductors; means 'for discharging milk upon the upper conductor, and means for conducting the milk from a point adjacent to the lower conductor to said chamber.

7. Apasteurizing apparatus having, in combination, a milk-holding chamber; an

Hupper and a lowertempering-fiuid conductor surrounding the chamber; means for establishing and breaking communication between the adjacent'ends of said'rconductors; means Jr'or supplying tempering fiuids to the conductors; means for discharging milk upon the upper portion or' the upperconductor, and means for conducting the milk from a point adjacent tothe lower portion of the lower conductor to said chamber.

8. A pasteurizing apparatus having; in combination, a `milk-holding chamber; a tempering-duid conductor; a milk distribun tor for discharging milk upon said conductor; a 1nilk-collectingvtrough near the'lower portion of the conductoryavmilk pump; a milk supply pipe; a milk outlet; means for alternately connecting the pump to the milk distributor and said chamber; land means for connecting the trough to the pump when heating-and tor connecting the chamber to the pump and the trough to the outlet when cooling.

9. A pasteurizing apparatus having; in combination, a milk-holding chamber; a milk heater and cooler; means for supplying milk ,to'said heater and cooler; a milk-receiving element associated with the heater and cooler; a milk pump; a-milk outlet; means for alternately connecting the pump to the `milk-supplying means and said chamber,

and-meansfi-or connecting the receiving ele- Vment to the pump when' heating and for connecting the chamber to the pumpk and the receiving element to the outlet when cooling.

l0. A pasteurizing apparatus having, in combination, a milkholding chamber; a tempering-tliiid conductor surrounding the chamber; a milk distributor for discharging milk upon the upper portion of said conductor; a milk-collectingA trough near the lower portion of the conductor; a milk pump; a milk-supply pipe; a milk outlet; means for alternately' connecting the pump to the milk distributor and said chamber, and means for connecting the trough to thepump when heating and for connecting the chamber to the pump and the trough to the outlet when cooling. Y

11. A pasteurizing apparatus having, in combination; a milk-holding chamber; a milk heater and cooler; means for supplying milk to said heater and cooler; a milk-receiving element associated with the heater and cooler; armilk pump; a feed pipe; a pipe leading to said milk-supplying means; a pipe leading to the milk-holding chamber; a pipe leading from the pump; a four-way valve controlling all of said pipes; a pipe extending Jfrom said receiving element; a pipe extending from said chamber; a pipe leading to the pump; an outlet pipe, and a four-I way valve oontrollingthe last-mentioned four pipes.

12. A pasteurizing apparatus having, in vlcombination, a milk-holding chamber; a milk heater and cooler; means `for supplying Vmilk to said heater and cooler; a milk-receiving element associated with the heater and Cooler; a milk pumpy connected to said receiving element; a feed pipe; a pipe leading to said milk-supplying means; a pipe leading to the milk-holding chamber; a pipe leading from, the pump, and a four-Way valve controlling all of said pipes. Y

13. A pasteurizing apparatus having, lin combination, a milk-holding chamber; a

rmilk heater and cooler; a milk-receiving element associated with the heater Vand'cooler;

a milk pump; a pipe extending from said receiving element; a pipe extending from saidA chamber; a pipe leading to the pump; an outlet pipe, and a four-Waygvalve vcontrolling all of said pipes.

111. In a pasteurizer, a milk-holding chamber, a tempering fluid conductor on the eX- terior. of said chamber over which the milk to be treated is caused to flow, anda lcasing,vv

surrounding said conductor and comprising two sections hinged so as to be swingable to permit access to the conductor.

15. In a pasiteurizer, a milk-holding chamber, a tempering fluid conductor on the eX-l terior of said chamber over which the milk to be treated is caused to How, a trough below said conductor forcollecting thefmilkf therefrom, and a casing `surrounding'said conductor and arranged to cover said trough, said lcasing comprising a pluralityof hinged sections sWingable to permit of access to the conductor and trough.

16. A combined pasteurizer, holder, and cooler comprising a milk holder, a unitary device for heating and cooling milk encompassing the holder, and means for conducting milk from the device to the holder and i back to the device. Y

17.151l combined pasteurizer, holder, and if cooler comprising a milk holder, a unitary heating and cooling device encompassing for conducting rmilk from the holder and backto the device.

18. A` pasteurizing apparatushaving, in combination, a milkholding chamber; a tempering fluid conductor surroundingrthe ltheV holder and Vhaving one 'Wall thereof formed by the Wall of the holder', and means device to the chamber and having one Walll thereof Vformed by thevvall ofthe holding chamber; means for discharging milk upon the' upperfportion of said conductor, and means for con-gl ducting the milk from Va point adjacent the lower portion ofthe conductor to said milk-v holding. chamber.

' 19. l14;.pasteurizing apparatus having,;in

combination,` -a =milkholding chamber; ai

temperingjfluid4 conductor of `helical-like-,Y-y

form surrounding the chamber, they convo'-k 'lutions thereof having Y' substantially hoi-ifY zontal upper surfaces and a curvedunder 20.' A Y combined past.eurizerl i holder, Land passing the -holdeiqandpresenting a some-y Whatiundulatory outer surface and means 7 5.V

holderand back to the device. v

Injtestimony whereof s et our hands. Q Y IRVING R.HIPPENMEYER.

- CHARLES' SKIDD.

for'conducting milk from the device 'COthe we `have hereunto 'l i 

